US2807572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for removal of popcorn polymer from columns by continuous filtration
Assignee: Phillips Petroleum Co
•
Filing: 1955-05-26
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Granted: 1957-09-24
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Expires: 1975-05-26
Abstract
No abstract record available.
Inventors
- 👤 Willis M Zoller
- 👤 Lemaster C Mcgill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:36
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/34; C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/901; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
IN A PROCESS FOR THE RECOVERY OF A LIQUID MONOMERIC MATERIAL FREE OF POPCORN POLYMER FORMED IN A RECOVERY ZONE IN THE PRESENCE OF A LIQUID WHICH IS IMMISCIBLE WITH AND HEAVIER THAN SAID MONOMERIC MATERIAL, SAID IMMISCIBLE LIQUID BEING PRESENT IN AN AMOUNT SUFFICIENT TO FORM A SEPARATE IMMISCIBLE LIQUID PHASE WHEREBY AN INTERFACE IS FORMED BETWEEN THE MONOMERIC MATERIAL PHASE AND THE IMMISCIBLE LIQUID PHASE, THE IMPROVEMENT WHICH COMPRISES WITHDRAWING A LIQUID STREAM CARRYING SAID POPCORN POLYMER THROUGH A DRAW-OFF POINT AT SAID INTERFACE IN AN AMOUNT SUFFICIENT TO PREVENT AN ACCUMULATION OF THE POLYMER WITHIN THE RECOVERY ZONE.
Claim 2
Dependent Claim
101 words
IN A PROCESS FOR THE RECOVERY OF A LIQUID MONOMERIC MATERIAL FREE OF POPCORN POLYMER FORMED IN A RECOVERY ZONE IN THE PRESENCE OF A LIQUID WHICH IS IMMISCIBLE WITH AND HEAVIER THAN SAID MONOMERIC MATERIAL, SAID IMMISCIBLE LIQUID BEING PRESENT IN AN AMOUNT SUFFICIENT TO FORM A SEPARATE IMMISCIBLE LIQUID PHASE WHEREBY AN INTERFACE IS FORMED BETWEEN THE MONOMERIC MATERIAL PHASE AND THE IMMISCIBLE LIQUID PHASE, THE IMPROVEMENT WHICH COMPRISES WITHDRAWING A LIQUID STREAM CARRYING SAID POPCORN POLYMER THROUGH A DRAW-OFF POINT AT SAID INTERFACE IN AN AMOUNT SUFFICIENT TO PREVENT AN ACCUMULATION OF THE POLYMER WITHIN THE RECOVERY ZONE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |